erratic temperatures inner probe / outdoor OKOFEN

Heating, insulation, ventilation, VMC, cooling ... short thermal comfort. Insulation, wood energy, heat pumps but also electricity, gas or oil, VMC ... Help in choosing and implementation, problem solving, optimization, tips and tricks ...
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christina86
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by christina86 » 29/04/14, 03:33

manet42 wrote:Ambient setpoint 8 °, when the ambient T ° exceeds the setpoint + hysteresis: Reduced mode 18 ° 5, it is 20 °, the heating stops and the setpoint becomes 8 °.


yes, this is normal Chaboum, 8 ° in Oko language it is when there is no need, and also when the boiler modulates downwards, its setpoint is 8 °

besides it annoyed me that it cuts the heating instead of sending less hot, because after it is hassle to go up ...
until I also deactivate the workshop probe - where I make a reduction - so that the regulator sends just less heat, according to the calculation of the curve (without compensation) - it was quite stupid, but I took a long time to find / understand ...

and even better: I always put in a reduction (14 °), the sun is enough to rise during the day (18 °), and I put back in my car only when it is gray and rain for several days.

and lately it was sunny and warm during the day, I stopped it outright: the sun was making me 20 ° and the insulation kept the night at 16-17 even when outside it dropped by 15-20 ° .
And there when it started to get cold and rainy again, it was still 16 ° inside (my day set point), but I was cold ... probably because the water in the walls was at 16 - so I re-lit, with setpoint 16 always, for this the boiler sent water at 20-22 ° in the walls - and suddenly it was good while the air was still at 16 ... confirming the theory that warmer walls that air = comfort (and vice versa ...)
This is what had convinced me, among other things, to opt for heated walls - and indeed I heat 3 ° less with that, and for much better comfort!
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by Did67 » 29/04/14, 14:39

chaboum wrote:
We are NOT talking about the setpoint temperature !!! Better understood there ?? That's why I was talking about "simulation" !! The measured temp sent to the regulator changes depending on the position of the forced button night / forced day / auto. it's not what you read ??

Do you understand better what I said ??


1) OK. Everything is therefore clear. What you reported was correct. My apologies for being frowned upon and for being annoying.
key is that you used the term "temp amb." (which is correct, but not the one displayed) has me left in doubt.. I'm not saying you were wrong. I was saying what normally should happen. I wanted to be sure).

2) Consequently, I do not understand the passage of the measured temp to 1 ° less when one switches in mode "forced reduction". So that's part of the mystery of this erratic probe!

In any case, especially if it is repeated systematically (I suppose, since you took the photos again?), I don't understand: a measured temp cannot change like that!

It looks like a "bug"! In the probe? In the software ??? In the cabalge?

It would be good if others with the same regul make the same manipulation to see if it is common to all this series of probes or particular to yours!

3) On the other hand, as christina and manet have indicated to you, the setpoint of 8 ° which is displayed is indeed "normal": under the conditions indicated, if the setpoint + hysteresis temperature is exceeded, the system considers that there is no need for heating, which is translated by the code "+ 8 °". You just have to know. Later, once the house has cooled, the lowered setpoint should appear (eg 17 °).
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by Did67 » 29/04/14, 14:50

I take this opportunity to highlight another incongruity:

- on the ^ hoto 2, the measured temperature therefore goes to 18,5 ° (when in reality, it must always be at 19,5 ° since it could not really move!)
- the deposit, for its part, remains at 19,5 ° (while we are in forced lowered mode: how much is your temp setpoint lowered ???)
- suddenly, the starting temperature "heating setpoint 1") goes up again !!! (Logically, the regulation believes that it must aim for 19,5 - the setpoint - while the probe tells it that it is only 18,5 °; it therefore increases the starting temperature! In this sense, it is " logical "!).

So the "forcing down" will cause the temperature to rise, indirectly !

Nice salad!

With that, no chance to properly set up your bazaar!

I have no answer to "why?". But this is not "normal"! However, there is a doubt about the wiring (the fact that the setpoint temperature remains at 19,5 ° could indicate that it is .... the measured temperature; if your "lowering" setpoint is set to 18,5, the interference would become blatant!).

PS: not "specialist"! Just curious. And I am these Okofen - and others! - since early 2008. So "passionate" if you want. Pure amateur!
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Dams38
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by Dams38 » 29/04/14, 20:46

I have exactly the same phenomenon as Chaboum, when I touch the control button of the boiler on the probe, the temperature read by the regulation changes suddenly (about 1degree indeed)

I think it's related to the way the analog probe works, I found that it returns to normal - sometimes - a few minutes later.

I'm gonna be on vacation next week and I have to move
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christina86
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by christina86 » 29/04/14, 22:46

Did67 wrote:- in photo 2, the measured temperature therefore goes to 18,5 ° (when in reality, it must always be at 19,5 ° since it could not really move!)
- the deposit, for its part, remains at 19,5 ° (while we are in forced lowered mode: how much is your temp setpoint lowered ???)

no Did, this is the 3rd photo which corresponds to the forced reduction
- the 2nd photo it's when it goes from "auto" to comfort, so the setpoint 19.5 is normal (phew! at least that ...)

but he has to control the wiring (in the probe and in the regulator at the finish), because it looks like his button is imagined in place of the wheel - since this is exactly how reacts the wheel - and the wheel of the blow also messes up, if it imagines to be button ??



@chaboum
,
can you give us some elements of your programming?
hysteresis eg. too low would also explain the temperature yoyos (each time you have to wait for it to drop a degree below the set point to restart and therefore often creates the feeling of cold)

and your water law is how much, out of curiosity?

because if the curve was well adjusted (compared to your false external probe) it should have a hell slope (the maximum being 4) otherwise indeed the internal probe must correct enormously when it is cold ... (while qu 'she is there to refine, not to do all the work!)

anyway they should change it for you, because even if it can work with a very steep slope, it may not be very subtle anyway ... you should already know if your external probe is linearly false?
to find out, the correspondences should also be noted at +5, 0, -5, -10 ...

in any case with your -2 when it is -15, we see that your slope should be to the max if you want it to heat by -15 real ...:

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by Chaboum » 29/04/14, 22:59

@Did67
- on the ^ hoto 2, the measured temperature therefore goes to 18,5 ° (when in reality, it must always be at 19,5 ° since it could not really move!)
- the set point, for its part, remains at 19,5 ° (while we are in forced lowered mode: how much is your temp set lowered ???)


No no, in photo 2 it is the forced comfort mode. The setpoint therefore does not move.
And my set temperature down is 18.5

@ Christina86:
Thank you for caring about me too. Thank you for your advice !! but you know I gave up believing it since 2010 !! because nobody knew how to solve the problem !! Yes yes, Okofen I know their number, I even had the intervention of S. Musso at the time of Okofen France in Chambéry, he even left me a usb key in recording for qq time, then I gave him sent for him to study. He changed the regulator, the probe, checked the wiring ..... in short, super nice, we could see that he wanted to help me out and do everything possible ... he looked at the neighborhood, looking for interference by photovoltaic panels in the area, asked if there was a factory in the area .... in short .... everything, .. but ............. So I have a hyper functioning weird for all these years: but it's "stable" if I don't touch anything !! so ...... what to do ?? again ??? I got back on the forum these days to see if there was news, identical things to my house ...., but ..... I dare not hope, and especially annoy you !!! because .. it is a PUZZLE apparently !! ??

Completely agree with you to first adjust the curve, but it is possible IF the outdoor sensor gives good values ​​!!! I mean by CONSTANT OFFSET? However, it is not the case !!! if still this gap was constant, of course it would be easy !!

thanks again to all for your support !! but I don't know if I should still believe in a possible improvement ..... maybe Diams38 which seems to have the same phenomenon when we change the position button ... which means that we are only 2 on all okofen with room sensor ????
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by Did67 » 30/04/14, 15:37

You mention two things:

a) the room sensor, with "mood swings" when you touch the dial and inconsistencies when you change "mode" (what we discussed just before, with the photos); there, there are other testimonies (if only christina).

b) the external probe which would give erratic information to you; and there, on passive wire, I have never read anything like it!

I have a memory of seriously erroneous data. The forumeur found quite quickly: a connection terminal, in the outer box, oxidized. As the probe, in fact, measures a resistance, if something is added to the circuit which increases the resistance, the data transmitted is erroneous and is translated into an erroneous temperature. Ex: oxidation point; very long thread; "twisted" wire in the conductive part has been "stretched" ... are examples of things that increase resistance and "trick" regulation.

That there is a discrepancy is common: it is set, but is not always done.

I don't know if mine is "right". I do not care. On the other hand, it moves in the right direction: the colder it is, the lower its indication ... And this is sufficient to adjust the heating curve!
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Re: Erratic temperatures inside / outside probe Okofen




by Chaboum » 16/02/19, 23:32

Hello everybody

and yes, qq years later I come back because today I made a discovery !!!

My brother-in-law has an Okofen like me, (but a last generation installed 2 years ago)
I ask him to take a look, because he has a room thermostat like me.
Well, my problem with the problem room sensor may have come from there because:

His home:
auto mode, 20 ° current ambience, we go to the boiler: there is Amb Amb. 20 ° displayed on the screen too. Amb. Cons: 8 ° Perfect !!
We go to the room thermostat: we push the request for + 2 ° room, so we want 22 °, we go to the boiler, there is ALWAYS Ch. Amb 20 °, and it is the Amb Consigne which has changed !!!

At home: when I make a temperature change on my thermostat, it is the T ° Ch. Amb which changes !!!! and moreover in any sense and in a completely bizarre way !!!! This is why, for 8 years I believe, I never touch my room thermostat for fear that it sends anything as info to the regulation !!! So, auto mode, it is on a temperature position which corresponds to reality and I don't touch it anymore !!!

So: advice to specialists: my probe problem (8 years old) could come from there ???

When you turn the dial of the room thermostat, it should not change the room temperature which is displayed on the regul !!!! I've just ?? But the instruction !! ??

Thank you for your answers !!
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